Improved optical properties of CdS quantum dots by ligand exchange |
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| Affiliation: | 1. Dipartimento di Chimica, Università degli Studi di Bari, IPCF CNR, via Orabona 4, I-70126 Bari Italy;2. CNR IPCF Sez. Bari c/o Dip. di Chimica, Università di Bari, Bari Italy;3. DETO and INFM, University of Bari, Via Amendola 173, 70126 Bari Italy |
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| Abstract: | High-quality CdS nanocrystals with highly efficient and narrow band edge emission have been prepared by means of decomposition of suitable precursors in non-coordinating solvents at high temperature. The role played by capping ligands, solvents and their interactions has been investigated by optical measurements. Capping layer exchange treatments with different amines have been carried out suggesting a possible influence of alkylic chain length in modifying the optical properties of CdS nanocrystals. Enhancement of band edge emission has been demonstrated with octylamine ligand. |
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